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Restore FreeBSD sysctl processing for arc.min and arc.max

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Before OpenZFS 2.0, trying to set the FreeBSD sysctl vfs.zfs.arc_max
to a disallowed value would return an error.
Since the switch, it instead only generates WARN_IF_TUNING_IGNORED

Keep the ability to set the sysctl's specifically to 0, even though
that is less than the minimum, because some tests depend on this.

Also lost, was the ability to set vfs.zfs.arc_max to a value less
than the default vfs.zfs.arc_min at boot time. Restore this as well.

Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com>
Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Signed-off-by: Allan Jude <allan@klarasystems.com>
Closes #12161
This commit is contained in:
Allan Jude
2021-08-16 11:35:19 -04:00
committed by GitHub
parent 41bee4039c
commit e945e8d7f4
6 changed files with 98 additions and 6 deletions
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include/os/freebsd/spl/sys/mod_os.h
+6
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@@ -62,6 +62,12 @@
#define param_set_arc_long_args(var) \
CTLTYPE_ULONG, &var, 0, param_set_arc_long, "LU"
#define param_set_arc_min_args(var) \
CTLTYPE_ULONG, &var, 0, param_set_arc_min, "LU"
#define param_set_arc_max_args(var) \
CTLTYPE_ULONG, &var, 0, param_set_arc_max, "LU"
#define param_set_arc_int_args(var) \
CTLTYPE_INT, &var, 0, param_set_arc_int, "I"